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