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