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