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