One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,11)(4,10)(5,7)(6,9)(8,12)(13,16)(14,15)(17,18)(19,28)(20,25)(21,36)(22,34)(23,27)(24,31)(26,29)(30,42)(32,44)(33,43)(35,41)(37,48)(38,45)(39,47)(40,46) involution — undirected(2,7)(8,15)(9,10)(11,16)(17,19,29,45,22,30,37,46,23,32,35,47,20,33,21,31)(18,24,36,43,25,39,41,44,27,40,48,42,34,38,26,28)(1,3)(2,8)(4,12)(5,13)(6,14)(7,15)(9,11)(10,16)(17,18)(19,24)(20,34)(21,26)(22,25)(23,27)(28,31)(29,36)(30,39)(32,40)(33,38)(35,48)(37,41)(42,47)(43,45)(44,46) involution — undirected(1,4,5,6)(2,9,7,10)(3,12,13,14)(8,11,15,16)(17,20,23,22)(18,25,27,34)(19,30,32,33)(21,35,37,29)(24,38,40,39)(26,36,41,48)(28,42,44,43)(31,45,46,47)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.