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