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