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