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