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)(11,13)(12,14)(15,16)(17,18,23,26)(19,24,29,31)(20,22,30,28)(21,25,32,27)(2,5)(6,8)(9,11)(10,13)(12,15)(14,16)(17,19)(18,24)(20,27)(21,22)(23,29)(25,30)(26,31)(28,32) involution — undirected(11,15)(13,16)(17,20,22,26,23,30,28,18)(19,27,21,31,29,25,32,24)(11,15)(13,16)(17,21)(18,25)(19,28)(20,24)(22,29)(23,32)(26,27)(30,31) involution — undirected(1,3,4,7)(2,6,5,8)(10,14)(13,16)(19,29)(21,32)(24,31)(25,27)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.