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