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