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