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