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