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