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