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