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