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