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