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