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