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