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