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