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