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