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