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