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