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