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)(19,23)(20,22)(21,24)(25,27)(26,31)(28,30)(29,32)(33,34,39,42)(35,37,40,45)(36,38,41,47)(43,44,46,48)(2,7)(3,11)(4,14)(13,15)(17,18)(19,25)(20,22)(21,24)(23,27)(26,32)(28,30)(29,31)(33,35,39,40)(34,37,42,45)(36,43,41,46)(38,44,47,48)(2,7)(4,14)(8,10)(12,16)(18,20)(23,25)(24,28)(31,32)(35,40)(37,45)(43,46)(44,48) involution — undirected(1,3)(2,8)(4,12)(5,15)(6,11)(7,10)(9,13)(14,16)(17,19)(18,23)(20,25)(21,29)(22,27)(24,32)(26,30)(28,31)(33,36)(34,38)(35,43)(37,44)(39,41)(40,46)(42,47)(45,48) involution — undirected(1,4)(2,9)(3,12)(5,7)(6,14)(8,13)(10,15)(11,16)(17,20,22,18)(19,25,27,23)(21,28,30,24)(26,32,29,31)(33,37,39,45)(34,40,42,35)(36,44,41,48)(38,46,47,43)(1,5,6,9)(2,4,7,14)(3,13,11,15)(8,16,10,12)(17,21,22,30)(18,24,20,28)(19,26,27,29)(23,31,25,32)(33,38)(34,41)(35,44)(36,42)(37,46)(39,47)(40,48)(43,45)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.