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