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