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