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