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