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