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