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