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