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