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