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