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