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