One vertex per element, one color per generator, with an edge from x to x·s.
(4,12)(8,15)(10,16)(13,14)(18,21)(20,24)(25,29)(28,30)(34,40)(35,44)(36,46)(43,47) involution — undirected(1,2)(3,7)(4,8)(5,9)(6,11)(10,14)(12,15)(13,16)(17,18,23,21)(19,24,27,20)(22,25,31,29)(26,30,32,28)(33,34)(35,41)(36,38)(37,43)(39,40)(42,46)(44,48)(45,47)(1,3)(2,6)(4,10)(5,11)(7,9)(8,13)(12,16)(14,15)(17,19,23,27)(18,24,21,20)(22,26,31,32)(25,30,29,28)(33,35)(34,41)(36,45)(37,46)(38,47)(39,44)(40,48)(42,43)(1,3)(2,7)(4,10)(5,11)(6,9)(8,14)(12,16)(13,15)(17,20)(18,19)(21,27)(22,30)(23,24)(25,32)(26,29)(28,31)(33,36,39,46)(34,42,40,38)(35,45,44,37)(41,43,48,47)(1,4)(2,8)(3,10)(5,12)(6,13)(7,14)(9,15)(11,16)(17,21,23,18)(19,20,27,24)(22,29,31,25)(26,28,32,30)(33,37,39,45)(34,43,40,47)(35,46,44,36)(38,41,42,48)(1,2)(3,6)(4,8)(5,9)(7,11)(10,13)(12,15)(14,16)(17,22,23,31)(18,25,21,29)(19,26,27,32)(20,28,24,30)(33,38,39,42)(34,36,40,46)(35,47,44,43)(37,41,45,48)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.