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