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