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