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