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)(17,18,22,24)(19,26,29,23)(20,21,31,25)(27,28,30,32)(33,34,38,39)(35,37,42,41)(36,40,47,44)(43,48,45,46)(4,11)(7,9)(12,16)(14,15)(17,19,22,29)(18,23,24,26)(20,30,31,27)(21,28,25,32)(33,34,38,39)(35,41,42,37)(36,44,47,40)(43,48,45,46)(2,3)(7,9)(8,10)(14,15)(18,24)(20,31)(23,26)(27,30)(34,39)(35,42)(40,44)(43,45) involution — undirected(1,3,6,2)(4,9,11,7)(5,10,13,8)(12,15,16,14)(17,20)(18,25)(19,27)(21,24)(22,31)(23,28)(26,32)(29,30)(33,35)(34,37)(36,45)(38,42)(39,41)(40,46)(43,47)(44,48)(1,4,6,11)(2,7,3,9)(5,12,13,16)(8,14,10,15)(17,19)(18,26)(20,30)(21,32)(22,29)(23,24)(25,28)(27,31)(33,36,38,47)(34,40,39,44)(35,43,42,45)(37,48,41,46)(1,5)(2,8)(3,10)(4,12)(6,13)(7,14)(9,15)(11,16)(17,21,22,25)(18,20,24,31)(19,28,29,32)(23,30,26,27)(33,37)(34,35)(36,46)(38,41)(39,42)(40,45)(43,44)(47,48)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.