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