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