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