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