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