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