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