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)(11,16)(12,15)(13,14)(17,18)(19,24)(20,26)(21,25)(22,27)(23,28)(29,43)(30,38)(31,39)(32,40)(33,42)(34,41)(35,44)(36,45)(37,47)(46,48) involution — undirected(1,3,5,4)(2,6,7,8)(10,14)(15,16)(17,19)(18,24)(20,30)(21,31)(22,29)(23,36)(25,39)(26,38)(27,43)(28,45)(32,35)(33,46)(34,47)(37,41)(40,44)(42,48)(1,4,5,3)(2,6,7,8)(9,11,13,12)(10,15,14,16)(18,25)(19,29)(20,23)(22,35)(24,37)(27,42)(30,32)(31,47)(33,34)(36,46)(38,48)(39,43)(40,45)(41,44)(2,7)(6,8)(9,12,13,11)(10,16,14,15)(17,20,21,23)(18,26,25,28)(19,30,31,36)(22,33,34,35)(24,38,39,45)(27,42,41,44)(29,46,47,32)(37,40,43,48)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.