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