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