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