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