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