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)(11,14)(12,13)(15,16)(17,18,21,23)(19,20,26,30)(22,24,31,32)(25,29,27,28)(2,5)(6,8)(17,19,21,26)(18,20,23,30)(22,25,31,27)(24,29,32,28)(10,13)(14,16)(18,23)(19,25)(20,28)(22,31)(26,27)(29,30) involution — undirected(9,11,12,15)(10,14,13,16)(17,20)(18,19)(21,30)(22,29)(23,26)(24,25)(27,32)(28,31)(1,3,4,7)(2,6,5,8)(19,25)(20,29)(22,31)(24,32)(26,27)(28,30)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.