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