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