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