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