One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,7)(4,8)(5,6)(9,10)(11,15)(12,13)(14,16)(17,18,22,25)(19,26,29,23)(20,21,32,27)(24,28,31,30)(2,6)(7,8)(9,10)(11,14)(12,13)(15,16)(17,19)(18,23)(20,31)(21,28)(22,29)(24,32)(25,26)(27,30) involution — undirected(1,3,5,4)(2,7,6,8)(10,13)(14,15)(17,20,21,25,22,32,27,18)(19,26,30,31,29,23,28,24)(1,3,5,4)(2,7,6,8)(9,11,12,16)(10,14,13,15)(17,19,27,28,22,29,21,30)(18,24,32,23,25,31,20,26)(1,4,5,3)(2,7,6,8)(17,21,22,27)(18,20,25,32)(19,28,29,30)(23,31,26,24)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.