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