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