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