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