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