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