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