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