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