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