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