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