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