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