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