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