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