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