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