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