One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,8)(4,11)(5,9)(6,7)(10,16)(12,13)(14,15)(17,18,22,25)(19,23,28,31)(20,21,24,29)(26,27,30,32)(33,34)(35,43)(36,47)(37,48)(38,42)(39,40)(41,44)(45,46)(1,2)(3,4)(5,9)(6,7)(8,11)(10,12)(13,16)(14,15)(17,19)(18,23)(20,26)(21,27)(22,28)(24,30)(25,31)(29,32)(34,40)(35,44)(36,48)(42,46) involution — undirected(2,7)(4,8)(9,15)(12,16)(17,19,22,28)(18,23,25,31)(20,26,24,30)(21,27,29,32)(33,35,39,44)(34,41,40,43)(36,45,48,38)(37,46,47,42)(1,3)(2,8)(4,7)(5,13)(6,11)(9,12)(10,14)(15,16)(17,20)(18,21)(19,26)(22,24)(23,27)(25,29)(28,30)(31,32)(33,36)(34,37)(35,45)(38,44)(39,48)(40,47)(41,46)(42,43) involution — undirected(1,4,6,8)(2,3,7,11)(5,12,14,16)(9,10,15,13)(17,19)(18,23)(20,26)(21,27)(22,28)(24,30)(25,31)(29,32)(33,37)(34,36)(35,46)(38,43)(39,47)(40,48)(41,45)(42,44)(1,5)(2,9)(3,10)(4,12)(6,14)(7,15)(8,16)(11,13)(17,21)(18,24)(19,27)(20,25)(22,29)(23,30)(26,31)(28,32)(33,38,39,45)(34,42,40,46)(35,36,44,48)(37,43,47,41)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.