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