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