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