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