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