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