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