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