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