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