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