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