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