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