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