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