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