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