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)(11,15)(12,14)(13,16)(19,26)(22,30)(27,32)(29,31) involution — undirected(1,3,4,7)(2,5,6,8)(9,11)(10,13)(12,16)(14,15)(17,18,21,24)(19,27,26,32)(20,23,28,25)(22,31,30,29)(2,6)(5,8)(11,16)(13,15)(17,19,28,31,21,26,20,29)(18,22,23,32,24,30,25,27)(10,14)(13,15)(17,20,21,28)(18,23,24,25)(19,29,26,31)(22,32,30,27)(17,19,20,29,21,26,28,31)(18,22,25,27,24,30,23,32)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.