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