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