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