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