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