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