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