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