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