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