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