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