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