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