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