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