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