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