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