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