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