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