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