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