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