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