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