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