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