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