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)(19,25)(20,33)(21,27)(22,28)(23,38)(24,29)(26,35)(30,40)(31,41)(32,43)(34,48)(36,45)(37,42)(39,47)(44,46) involution — undirected(1,3)(2,5)(4,8)(6,7)(9,10)(11,15)(12,14)(13,16)(17,19)(18,25)(20,34)(21,30)(22,37)(23,31)(24,32)(26,44)(27,40)(28,42)(29,43)(33,48)(35,46)(36,47)(38,41)(39,45) involution — undirected(9,11)(10,13)(12,16)(14,15)(17,20)(18,26)(19,30)(21,24)(22,35)(23,36)(25,39)(27,28)(29,45)(31,46)(32,34)(33,38)(37,47)(40,41)(42,48)(43,44) involution — undirected(3,8)(5,7)(11,16)(13,15)(17,21,24,20)(18,27,29,33)(19,30,32,34)(22,35,23,36)(25,40,43,48)(26,38,45,28)(31,47,37,46)(39,42,44,41)(2,6)(5,7)(10,14)(13,15)(17,22,24,23)(18,28,29,38)(19,31,32,37)(20,35,21,36)(25,41,43,42)(26,27,45,33)(30,46,34,47)(39,40,44,48)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.