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