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