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