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