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