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