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