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