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