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