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