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