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